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https://github.com/wetransfer/wescan
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InfluxDB
Purpose built for real-time analytics at any scale. InfluxDB Platform is powered by columnar analytics, optimized for cost-efficient storage, and built with open data standards.
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PaddleOCR
Awesome multilingual OCR toolkits based on PaddlePaddle (practical ultra lightweight OCR system, support 80+ languages recognition, provide data annotation and synthesis tools, support training and deployment among server, mobile, embedded and IoT devices)
I would recommend https://github.com/PaddlePaddle/PaddleOCR over the default tesseract. It seems to do a better job these days and uses more modern approaches.
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I've used OpenNoteScan before:
* https://f-droid.org/en/packages/com.todobom.opennotescanner/
* https://github.com/allgood/OpenNoteScanner
It works OK but it looks a bit old, and you need to install OpenCV Manager separately, outside of F-Droid for it to work.
I can deal with it, but there's no way I could ever be able to convince anybody else, especially non-tech people to use it.
This one looks like a winner in terms of UX, so I'll be using it from now on, Thank you for creating it!